Oil burner



March 22, 1927. f

F. HARDINGE OIL BURNER Filed May 5. 1923 2 Sheets-Sheet l 1621,53? March 22" 1927 F. HARDINGE n cn. BURNER Filed Hay 5. 192s 2 Suas-snm 2 42 l?, O4 O E Q Y '14 O i 65 ,-7

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Patented' Mar. `22, 19,27.

IIARDINGE, OF' CHICAGO, ILLINOIS, ASSIGNOR TO HABDINGE BROTHERS, INCORPORATED, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

" on. BURNER.

Application led Hay 5,

My linvention relates to improvements in oil burners, and is particularly concerned with the rovision of novel means for controlling t e flow of oil .to the atomizing nozzle. A.

The objects of my invention are- First; to provide an oil burner comprising an atomizing nozzle, a valve for controllin the low of oil tothe atomizing nozzle,

an thermostatically controlled means for.

actuating said valve so as to vary the supply of oil fed to the atomizing nozzle in accordance with varying conditions of operation, and thus maintain a. substantially constant temperature.

Second; to provide an oil burner of the character described, b means of which lthe quantity of fuel supplied to the atomizer can be varied between two limits, one of which nay, if desired, be zero. I prefer, however, to so control the valve as to cause oil to be supplied to the atomizer at two different rates, onel of which is greater than that required to maintain the desired temperature, and the other of which is less than that re.- quired to maintain the desired temperature, the control apparatus being such that the rate at which oil is supplied to the atomizing nozzle is varied between these two limits so as to maintain a. substantially lconstant desired temperature.-

Third; to provide means of the character described, for controlling the flow of oil to the atomizer, comprising means whereby the rate of flow of voil to the atomizer can be varied so that the consumption at the two limiting positions of the control apparatus may be varied as desired.

Fourth; to provide means of the character described for supplying fuel to an atomizer, comprising manually adjustable means which can be adjusted without disturbing the thermostatically controlled apparatus which normally adjusts the valve.

Fifth; to provide means of the character described, which can be actuated by practically any of the knowntypes of thermostatically controlled heatfregulatlngr' apparatus, and

Sixth; to provide an apparatus such as described, which is simple in constructlon, economical to manufacture and easy to opcrate.

Other objects of my invention will appear as this description progresses. reference be- 1'923. serial No.l escasa.

includes a diagrammatic illustration of the conventional thermostatically controlled heat regulating apparatus.

Figure 3. is a transverse line 3-3 of Figure 2, and

Figure 4 is a section taken on line 4.-4 of Figure 1, showing certain details of construction of the valve and the valve controlling apparatus forming a, part`of my invention.

Throughout the'several views, similar refcrence characters will be used for referring to similar parts as the several sections are taken looking in the direction of the small arrows. In the drawings I have illustrated my invention as forming part of an oil burner, comprising -a suitable base plate 5, on one end of which is mounted the-head 6 of the oil burner containing suitable gearing for transmitting the motion of the motor 7 through a shaft 8 contained in a housing 9 to the rotary atomizing nozzle 10. For supplying oil to the atomizing nozzle, I provide a suitable storage tank 11, from which the oil is drawn by the rotary pump 12. In flowing to the pump 12, the oil-passes through the intake pipe 13, a strainer 14, and a pipe 15. The oil is discharged from the pump 12 through the pipe 16 into'a pressure chamber comprising the two pipe sections 17 anflplti.y which are connected by the four-way union 19. 'lhe pressure tank thus formed is provided with an outlet pipe 20 shown in dotted outline,l which extends down somewhat below the union 19, and the upper end of which is connected with the pipe'21 by the four-way union 22. TheJ pipe 21 leads to the control valve 23, the details of construction of which will be referred to later on.

The oil passes through the '-valve 23 and from this valve through the pipe 24 to a stand pipe 25, which extends up through the head 6 and supplies oil to the4 rotary nozzle 10. A'

For maintaining the desired pressure upon the oil in the pressure chamber 18, I provide a pressure regulating valve 25' of any suitsection taken onl ing aninlet bore 28 and an outlet bore 29 in which is mounted a tubular Valve seat 30, which isl held in place by means of the threadedplug 31. A valve stem 32 extends through the chamber in the member 28 and into the tubular valve seat 30. The' other end of the valve projects outwardly through the opposite wall ofthe chambered body, and is rotatably supported by means of the hollow plug 33, which is provided with a suitable'stutling box construction 34. The inner end of the valve stem 32 has a longitudinally extending bore 35 formed therein and a transversely extending opening 36 which communicates with the longitudinally extending bore 35. A worm gear 3 7 is splinedkto the valve stem 32 adjacent its outer endand rests upon the outer end of the stuffing box.

The chambered body 27 is provided with a laterally extending projection 38 whichsupports a bracket 39, in which is journaled a shaft 40, the inner end of which'is provided with a worm 40 for rotating the worm gear 37. The outer end of the shaft has a grooved pulley 41 secured thereto, which is driven from theshaft 8 of the motor by means of another' grooved pulley 42. By the means just described, the valve stem 32 is continuously rotated while the burner isin operation, so as to prevent any sediment, dirt or other foreign matter from adhering -to the valve stem and clogging the very small openingV 36'. v The details of construction of the valve just described are clearly set. fortlr and claimed in-my co-pending patent application, Number 544,002, filed March V15, 1922, and further'description thereof appears to be unnecessary.` The application just referred to also contains a' disclosure of means for adjusting the valve stem in and out of the valve seat 30, so as to uncover more or less of the opening 36 and thereby control the rate of flow of fuel to the atomizer. This means comprises, among other things, a spring 43 which bears upon the top of the worm gear 37, and the other end of which abuts the split ring 44 carried by the outer end of the valve stem This spring yieldingly urges the valve stein in an outward direction, thereby tending to uncover more of the opening 36. In my application above referred to, I have provided manually adjustable means for pushing the valve stem 32 inwardly against the tension of the spring 43, and'thereby diminishing the rate of flow of fuel to the atomizer.

In my present application, thisv means comprises anv externally and internally threaded sleeve 45 which is supported'y between'two laterally extending bifurcations 46 of the bracket 39. To prevent rotation Y of the sleeve 45 between these bifurcations, I provide the clip 47 which drops into the slot .between the two bifurcations and projects 'wardly extending stem50, upon which is mounted the stop collar 51, which is secured 1n place by means of the set screw 52. A

sleeve 53 rests upon the stop collar 51, and

is rotatably mounted upon the stein 50. This vsleeve has a lateral projection 54 in which is adj ustably mounted the rod or cro'ss bar 55, which is held in its adjusted' positions by means of the set screw 56. .A segment 57 has its ends rigidly secured to the opposite ends of the cross bar 55, and is provided at spaced intervals with openings 58 adaptedy to receive the two stop pins 59. These pins are here illustrated as being made in the form of cotter pins and their upper ends project upwardly suflicient to engage the outer en-d of the arm 60, the inner end of which is provided with a sleeve 61 surrounding the outer end of the stem 50 and se-v cured thereto by means of a set screw 62.

From the above description, it will be apparent that when thestem 5() is rotated in one direction, the screw 48 will inove in- Wardly .and cause the corresponding inovel ment of the valve stem 32, which will result in a portion of the opening 36 being covered by the valve seat 30,- and'that when the stem 50 is rotated in the opposite direction, the result will be that a portion of the opening 36 will be uncovered, so that by' rotating the stern 5() in opposite directions, the rate of iow of oil to the atomizer can be either increased or diminished. This ycan be accomplished manually by adjusting the arm 60, but I prefer to provide thermostatically cont-rolle means for automatically effecting such adjustment, and for this purpose I prefer to make use of a heat regulator of well known construction, comprising a suitable motor connected withthe arms 64 so as to rotate these arms in opposite diln lli) if the regulator 63 'is positioned so that the direction of these cables must be changed in passlng from the yregulator to the cross bar 55, this can be accomplished by means of suitable grooved pulleys 66 rotatably mounted upon a. shaft 67 sup orted by a plug 6 8 carried by one nipple o' the four-way union A22. To permit a, certain amount of ladjustment of the shaft 67, I prefer to bend one end ofthe shaft 67 upon itself, as shown in Figure 2, and to secure this end of the shaft to the plug 68 by means of the set screw 69. A

From the above description, it will `be Feen that when the regulator 634 is actuated in the Iusual way to turn one arm 64 inonc direction and the other arm 64m the opposite direction, thecross bar will turn about the axis of the stem 50 in one direction, thereby moving the screw 48 inwardly and decreasing or entirely interrupting the flow` otffuel to the atomizer, but that when the regulator 63 moves the arms 64 in the re- -verse direction, the stem 50 will` be 'rotated to cause the screw 48 tomove outwardly, thereby permitting the spring 43 to expand and thus cause a greater portion of the opening 36 to be uncovered.. In this manner the rate of flow of fuel to the atomizer can be increased. The thermostatic control device which I have indicated at 63` and 65 it will be undersood is of the type wherein the cable reciprocating arms 64'give'the cable a-fixed movement in response to the' highand low temperature limits of the. thermostat 65.

It will, of course, be understood that'the 'motion of the cross arm 55 is transmitted t0 the stem,.50 through the segment 57, the pins 59, and the arm 60. It willalso be seen that by properly adjusting the pins 59 in the openings 58. any desired amount of lost motion between the segment 57 and the arm 60 can be obtained, and that the greater the amount of this lost motion, the less will bcthe movement of the arm 60. Under these conditions. the extent of adjustment of the valve will be small, so that there will l, be lslight variations in the rate of iow ot 1 uel to the burner. It will also be apparent `that when the lost motion.. between the pins and the arm is small, the arm 60 will be.l

moved through a muchlarger arc, thereby resulting in a greater variation in the flow,

of oil to the atomizer. Furthermore, by properly positioning the two pins, the llmits of the two. diiferent rates of 'low can be varied asl desired within the limits of thel apparatus. It' the screw 48 isa right hand screw and the two pins `are located adjacent the upper end of the segment in Figure 2,

the rate of flow of 'oil 'to the atomizer will vary between comparatively wide limits, but both of vthese limits will be smaller than when the two pinsA are located adjacent the lower end ofthe segment 5 7 in Figure 2.

If the movement given the valve through the-rotation of the segment 57 is not kSullicient to insure the desired rate of How of oil to the atomizer, the sleeve 45- and the screw can'be removed from the valve and of operation, and that these means are comparatively'simple in construction and easy to operate. `It will also be seen that while my controllingmeans is entirely automatic in its action, the rate of flownof fuelv to the burner can be manually adjusted b moving the arm 60 without in any way the automatic controlling means.

While I have described the details of construction of the preferred embodiment of my invention, it is to be clearl understood isturbing 4that my invention is not limlted to these details of construction, but is capable of the scope of the appended claims.

Having thus described my invention, what I claim is:

1. A burner comprising ,an atomizer, means for supplying fuel to said atomizer, including an adjustable valve, and means for controlling the adjustment of said valve, comprising a rotatable element having an arm extending at an an le to its axis, a segment rotatablymounte on said segment for limiting the movement of said segment relatively to saidarm, and a thermostatically controlled element for moving said Segment. y

2. The combination with a thermostat and a. fue] valve controlled thereby of an oper# ating member movable to var ments the fuel feed thro'ugh sald valve,`an

.sired tem erature under varying condltions other adaptations and modifications within j upon said rotatable element, a pair lof stops adjustably mounted by increactuating member moving under the control of the thermostat, one of said members 'forming asector and the other an arm, and 'a plurality of stops on the sector for contacting the arm to provide a lost motion connection between the elements, theesto s being adjustably positioned jon the sector or providing an adjustment of the high and low rates of fuel feed to which the valve is moved-by the actuating member.-

3.-The combination with a thermostat de vice anda fuel valve of an yoil .burner controlled thereby, of an operating member movable to vary by increments the fuel feed through' said valve, an actuating member moving under the control of the thermostat, one of said members forming a sector and the other an arm, and a plurality of stops on the sector for contacting the arm to provide a lost motion connection between the elements, thc stops being adjustably positioned on the sector independently of one another for providing an adjustment of the positions of high and low rates of fuel feed toI which the valve is moved by the actuating member. t

4. The colnblnation with a therniostatlc device and a fuel valve of an oil burner.

movable to vary by increments the fuel feed through said valve, an actuating member' moving under the control of the thermostatj through a fixed movement, one of said mem bers forming a sector and the other an arm, and a plurality of stops on the sector for contacting 4the arm to provide a lost motion 'connection between the elements,`the stops being adjustably positioned on the sector independently of one another for providing an adjustment of the positions of high and low rates of fuel feed to which the valve is moved by the actuating member.

ln Witness whereof, l hereunto subscribe my name this 21st day of April, 1923.

FRANKLNl HARDlNGE. 

